KR101601554B1 - Forming method for headrest by foaming - Google Patents

Abstract

The present invention relates to an integrated headrest foaming and molding method. The method includes the processes of: fixing a blow cover (110) and a J-hook (130) by using a mutual ultrasonic welding method; inserting a foaming pocket (140) into the blow cover (110) and finishing a trim cover (120) through the coupling of a lick unit (121) corresponding to the J-hook (130); and injecting a synthetic foam resin into the foaming pocket (140), shaping an integrated article, and removing a foaming liquid injection opening (141) from the foaming pocket (140). Accordingly, the present invention can reduce the weight and production cost compared to a conventional integrated molding method, ensure excellent appearance quality, prevent resinous odor by removing the foaming liquid injection opening, and prevent accidents involving a passenger due to a stapler.

Description

[0001] The present invention relates to a method of forming a headrest by foaming,

The present invention relates to a headrest monolithic foam molding method which is excellent in appearance quality as well as weight and cost reduction as compared with the prior art and can prevent a safety accident of an occupant by a stapler without generating a resin odor by eliminating a foam liquid inlet .

Generally, a headrest (100) is provided on a front seat of a vehicle so as to lean against a head of a passenger. The headrest (100) is made by inserting a skin that is sewn in a cloth having air permeability and a synthetic resin excellent in cushioning It is manufactured by injection foaming.

In order to finish the foamed synthetic resin as described above, it is integrally manufactured through various manufacturing methods such as a swing type, an end cover type, and a J-hook type.

As shown in FIG. 1, in the case of each of the above-described types, a swing type (mono-foam) type in which swinging function is applied by using the buttons 105 on both sides, However, it is very difficult to assemble the trim for integral molding. As the foaming liquid inlet 101 is exposed to the lower end of the headrest 100, the appearance quality is deteriorated , The odor of the chemical is very high at the time of first purchase.

In the case of the J-hook type, as shown in FIG. 2, the end cover is finished with the assembly structure of the J-hook and the lick, and then the synthetic resin is foamed integrally, However, there is a problem that the stapler 103 for fixing the connection damages the product as well as the passengers.

In addition, as shown in FIG. 3, in the case of the end cover type, the synthetic resin is foamed and integrally molded is similar to the swing type or the jack hook type, but two licks are assembled, It is possible to prevent damages to products and passengers by eliminating the jig hook-type stapler 103 process by integrally expanding the synthetic resin after the end of the trim cover, but the number of parts for assembling integrally increases, There is a problem that the manufacturing cost is increased. As the foaming liquid inlet 101 is exposed at the lower end of the headrest 100, the quality of the appearance is deteriorated as well as the resin odor is very serious.

In order to solve the above-mentioned problems, the present invention is characterized in that, prior to integrally manufacturing the headrest, the jack hook and the blow cover are fixed by ultrasonic welding to reduce weight and cost compared to the conventional integral molding method, And an object of the present invention is to provide a method of integrally forming a foam with a headrest capable of preventing a safety accident of a passenger by a stapler without generating a resin odor by eliminating a foaming liquid inlet.

According to an aspect of the present invention, there is provided a method of manufacturing a blow cover, the method comprising: fixing a blow cover and a jack hook by ultrasonic welding; inserting a foam bag into the blow cover; And injecting the foamed synthetic resin into the foamed bag, molding the foamed synthetic resin into a single body, and then removing the foamed fluid injection port of the foamed bag.

In this case, the blow cover and the jack hook are made of the same thermoplastic material for fixing by ultrasonic welding.

By providing the present invention constructed as described above, it is possible to reduce the weight and cost as compared with the conventional integral molding method, and to provide a stapler which is excellent in appearance quality, There is an effect that can be prevented.

1 to 3 are block diagrams of a headrest manufactured through a conventional integral foam molding method.
Fig. 4 is a process chart of a method of foaming a headrest monolith according to the present invention. Fig.
Fig. 5 is an enlarged cross-sectional view of a headrest and a main part manufactured by the method of forming a foam with a headrest according to the present invention. Fig.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art to which the present invention pertains.

4, a blow cover 110 constituting the body of the headrest 100 and a second hook 130 for finishing the trim cover 120 are connected to each other by ultrasonic waves And is fixed through fusion welding (S100).

As shown in FIG. 5, the blow cover 110 and the J hook 130 are made of materials having the same thermoplastic performance to form an ultrasonic welded portion F through mutual ultrasonic welding to fix them to each other desirable.

At this time, the foam bag 140 is inserted into the blow cover 110. (S200)

The foam bag 140 may be formed of a bag that can be expanded by an inner size of the blow cover 110 and may be formed with an injection port 141 extending to one side of the foam bag 140 to inject the foamed synthetic resin therein .

The opening of the blow cover 110 is closed by the trim cover 120 having the rick 121 corresponding to the J hook 130. In operation S300,

The hook 130 has a fixing plate 131 extending in the lengthwise direction of the blow cover 110 and a hook 133 is bent downward along the length of the fixing plate 131. The fixing plate 131, It is preferable that an insertion hole 135 is formed in the center of the opening 140 so that the injection port 141 of the foamed bag 140 can pass through.

The foamed synthetic resin is injected into the injection port 141 of the foam bag 140 along the insertion hole 135 to form the foamed synthetic resin and the blow cover 110 together. (S400)

Finally, when the integral foam molding is completed, the injection port 141 of the foam bag 140 is cut off. (S500)

At this time, after the injection port 141 is removed, the insertion hole 135 may be closed with rubber or silicone to block the malodorous resin.

By providing the present invention constructed as described above, it is possible to reduce the weight and cost as compared with the conventional integral molding method, and to provide a stapler which is excellent in appearance quality, There is an effect that can be prevented.

The terms and words used in the present specification and claims should not be construed to be limited to ordinary or dictionary terms. It should be interpreted as meaning and concept consistent with the technical idea of the present invention.

Therefore, the configurations shown in the drawings and the embodiments described herein are merely the most preferred embodiments of the present invention, and are not intended to represent all of the technical ideas of the present invention. Therefore, It should be understood that various equivalents and modifications are possible.

100: Headrest
110: blow cover
111:
120: Trim Cover
121: Rick
130: J-hook
131: Fixing plate
133: Hook portion
135: Insertion hole
140: Foam bag
141: inlet
F: Ultrasonic fusing part
S100: ultrasonic welding fusion step.
S200: Inserting the foam bag.
S300: trim cover finishing step.
S400: Step of integral foaming molding.
S500: Step of removing the opening of the sparkling stock

Claims (3)

A step (S100) of fixing the blow cover 110 constituting the body of the headrest 100 and the second hook 130 for finishing the trim cover 120 through ultrasonic welding;
(S200) of inserting the foam bag (140) into the blow cover (110);
Closing the opening side of the blow cover 110 with a trim cover 120 having a rick 121 corresponding to the J hook 130;
(S400) of injecting foamed synthetic resin through the injection port (141) of the foamed bag (140) and integrally molding the foamed synthetic resin;
(S500) cutting the injection port (141) of the foam bag (140). The method according to claim 1,
Wherein the blow cover (110) and the jack hook (130) are made of the same thermoplastic material for fixing by ultrasonic welding. The method according to claim 1,
The hook 130 is formed in a shape of a fixing plate 131 extending in the longitudinal direction of the blow cover 110 and a hook 133 is bent downward along the longitudinal direction of the fixing cover 131. The center of the fixing plate 131 Wherein the insertion hole (135) is formed to penetrate through the injection port (141) of the foam bag (140).

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